Indian Railways — Bike parcel not received at destination

Address:

India

Respected sir, i booked my bike parcel through indian railways from new jalpaiguri station (West bengal) to jamalpur junction (Bihar) on 04/09/2020
Bike-yamaha fzs registration number - wb74az3887
Parcel receipt number : b 176367
I made sure that the parcel was loaded in the train before it moved from njp station.
The train reached jamalpur station on 5/09/2020 at 08:55am but my bike wasn't unloaded. I enquired at the parcel office who informed me that it would be unloaded during the return journey. The train returned back from delhi on 7/09/2020 but my parcel (Bike) was missing in the boggy.
Train name and number : 05955 dibrugarh - delhi brahmaputra mail covid.